Apr 19 – 21, 2017
Trieste - Italia
Europe/Rome timezone
Proceedings: Il Nuovo Cimento C, Vol. 41, N. 1-2, 2018 : https://www.sif.it/riviste/sif/ncc/econtents/2018/041/01-02

The DarkSide program: toward a background-free DM search

Apr 21, 2017, 5:00 PM
Aula Magna - Edificio H3 (Trieste - Italia)

Aula Magna - Edificio H3

Trieste - Italia

Università degli Studi di Trieste Via Valerio nº 12/2 I-34127 Trieste (TS)
Poster contribution Sessione Cosmologia e Astroparticelle Archivio Poster


Claudio Savarese (GSSI)


The DarkSide programme aims to perform direct search for Dark Matter exploring WIMP-nucleon cross section down to the neutrino floor employing a dual phase TPC filled with Argon. Liquid argon is a unique scintillating material allowing an exceptional rejection of electron induced background events by means of pulse shape discrimination. This, together with neutron and muon vetoes, allows the current experiment, DS-50, to perform a background free direct search. Building on the experience acquired with the DS-50 detector, the DarkSide collaboration is proposing to build a 20 tons fiducial volume Liquid Argon TPC. Two important technological breakthroughs will allow DS-20K to achieve a sensitivity approaching the neutrino floor for high mass WIMPs. Firstly, Argon depleted of its radioactive isotope 39Ar extracted deep underground and purified to an unprecedented level thanks to the URANIA & ARIA programs will be used. Secondly, Silicon PhotoMultiplier arrays will replace traditional photo-multiplier tubes further suppressing the radioactivity inside the TPC, simultaneously providing the detector with higher photon detection efficiency and better resolution. The latest results from DS-50 and the current status of the DS-20k proposal, with particular attention to the advancement in the photo-electronics design will be discussed.

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